Signals are effective at reducing information asymmetries largely because they are costly to obtain. Additionally, so long as they are not redundant, multiple signals are more effective at reducing asymmetries and capturing the attention of the intended receiver than single signals. However, the very property that makes signals effective also makes accumulating and sending many of them prohibitive to resource constrained organizations. This poses a particular challenge for new ventures, who must send multiple signals to cut through a noisy signaling environment, even with acute resource constraints. To begin to address how organizations can economize the accumulation of multiple costly signals, I introduce the concept of gateway signals (i.e., signals whose underlying acquisition costs are shared with other signals, reducing the costs to attain those other signals). Gateway signals facilitate the acquisition of further signals, and thus have indirect effects on outcomes via other signals. I empirically illustrate the gateway signal phenomenon by testing product development as a gateway signal that impacts fundraising outcomes both directly and indirectly via endorsement signals in the context of reward-based crowdfunding, using a sample of 1,394 Kickstarter campaigns. Implications for theory and practice are discussed.